Which of the following is a true polynomial identity? a. (x^2+1)(x^2-a)= x^4-ab. (x^2+1)(x^2+a)= x^2(x^2+a+1)c. (x^2+1)(x^2+a)-a = x^2(x^2+a+1)d. (x^2+1)(x^2+a)= x^2+ax^2+a

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Bo is buying a board game that usually costs bb dollars. the game is on sale, and the price has been reduced by 18\%18%. what could you find the answer?

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?